Carbon-encapsulated Fe₃O₄ (Fe₃O₄@C) catalysts were prepared by a solvothermal method using glucose as the carbon source and their physicochemical properties were characterized via various analytical techniques.

The intramolecular synergistic effects of two dendritic antioxidants between hindered phenol groups and tertiary amine groups were investigated using the DPPH˙ method and the oxygen uptake method.

Carbon nanotubes (CNTs)-supported Pt nanoparticles were prepared with selective deposition of Pt nanoparticles inside and outside CNTs (Pt–in/CNTs and Pt–out/CNTs). The effects of Pt loading and reaction solvents on phenol hydrogenation were investigated. The Pt nanoparticles in Pt–in/CNTs versus Pt–out/CNTs are smaller and better dispersed. The catalytic activity and reuse stability toward phenol hydrogenation both improved markedly. The dichloromethane–water mixture as the reaction solvent, compared with either pure medium, decreased the catalytic activity toward phenol hydrogenation and selectivity of cyclohexanone over Pt–in/CNTs, but significantly improved the catalytic activity toward phenol hydrogenation and selectivity of cyclohexanone over Pt–out/CNTs.

Phosphorus-modified Zr-metal organic framework (P/Zr-MOF) catalysts were synthesized by a (NH ₄ ) ₂ HPO ₄ pyrolysis approach starting from Zr-MOFs.